Hi seriola - Yarra Bay and Long bay on the rocks fish consistantly for southern calarami, mostly catch small ones in these areas and usually around sunrise/sunset. La Perouse fishes squid less consistently but you get the big s. calamari here - some reall big ones too, this location fishes just as well at any time.
hpsauce - around structures and wharves I normally get arrow squid, not as good eating as southerns, but just as good a bait. If your fishing around a wharf, look for ambush points, arrows will hide in wait around large rocks, logs etc - dont drop the jig in top of them, they really hate this just cast out and bring it into these areas. I catch sotherns mostly by casting far and bringin it in and trying different depths.